2-Phenylsulfonylethylchloroformate (PSEC) 、
5'-O-pixylthymidine 以
吡啶 为溶剂,
反应 0.5h,
以86.6%的产率得到Carbonic acid 2-benzenesulfonyl-ethyl ester (2R,3S,5R)-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-2-(9-phenyl-9H-xanthen-9-yloxymethyl)-tetrahydro-furan-3-yl ester